Scaffold



(No Model.)

T. G. GOUDIB.

SGAFPOLD.

No. 344,734. Patented June 29,.1886.

i Il 1a Z my@ W N. PETERS, Pmu-umegmphef. wnhingmn DA c.

1o for its object 2o spective view of a 3o two bars of metal or wood,

spreading apart when being used.

upon the IINrTsn STaTns PATENT Ormes.

THOMAS CHARLES GOUDIE, OF CHICAGO, ILLINOIS.

SCAF

FOLD.

SPECIFICATION forming parthof Letters Patent No. 34%,'734, dated June 29, li866. Application filed February 2.3, 1886. Serial No. 192.883. (No model.)

To @ZZ whom it may concer-71..-

Be it known that I, THOMAS CHARLES GOUDIE, a citizen of the United States, residing at Chicago, in the county of Cook and 5 State of Illinois, have invented a new and useful Improvement in Scaffolds, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to scaffolds, having the provision in an article ot' the class named of means whereby the scaffold may be elevated or lowered and held in any desired position and transported from place to place.

To this end it consists in the construction, arrangement, and combination of parts for service, substantially as hereinafter described, and specifically pointed out in the claims.

In the drawings, Figure l represents perscaffold embody, .lng my in1- provements. Fig. 2 is a transverse sectional view thereof.

Referring to the drawings, in which similar letters of reference denote similar parts, A

e5 designates the frame of the scaffold-raising device consisting of the sill provided at its opposite ends with uprights a a2, the inner adjacent faces of which are provided with grooves or ways b, which may be formed by b', as shown, in which move and operate tenons c, formed upon the opposite ends of a cross-head, C.4

designates a transversely-extending bar that operates to hold the nprights a a2 from Each of the uprights a' a2 is provided at .its upper end with a metal cap, a, the inner sides of which are adapted to receive a sheave or pulley, c', over which passes acord, c, that extends from 4o eyebol ts d on the eross-head C over said sheaves to drums e, mounted upon a shaft, E, journaled in the uprights a a2, near the lower ends thereof. 'u l' ff designate spurgear-wheels inounted shafts at the inner ends of the drums e, the teeth of which engage with and are rotated bypinions g, mounted upon a shaft, C, jonrnaled in the uprights a a, above the shaft ds of the shaft G project E. The outer en through the nprights a ai, and are provided at their extreme outer ends with cranks g g2.

H H designate straining-rods that extend from points h near the bottom of the nprights to points 71, upon the upper surface of the s ill a of the frame A. I I designate similar straining-rods, that extend from the outer faces of said uprights ct a2, and are secured at their opposite ends to stakes driven in the ground for the purpose of holding said uprights 1n vertical position.

' If desired, f1'iction-pulleysk(see Eig. 2) may be used in connection with the tenons c of the cross-head C, said friction-wheels being placed in grooves or recesses formed in the side surfaces of said tenons.

L designate staging-planks secured at their ends to the upper surface of thecross-head C.

Z designates a ratchet-wheel mounted at one end of the shaft G, outside ofthe upright frame, the teeth of which are engaged by a pawl, Z', journaled to said uprights above the ratchetwheel.

If desired, straining-nuts or burrs Z2 may be used in connection with the strainingrods H H I I.

Modifications in detail of construction may be made in the herein-described invention Without departing from the spirit or sacricing the advantages thereof-as, for instance, the gear-wheels ff and pinions g may be dispensed with and the operating-handles attaehed directly to the projecting end of the shaft E, Whereon is mounted the drum.

I am aware of Patents Nos. 118,128 and 60,085, and I diselai n1 the devices therein shown and described.

Having described my invention, I claim* l. The combination of the frame A, having the sheaves at its upper end, the shaft E, journaled therein and having the drums, :a powershaft, G, also journaledin theframe and geared to the shaft E, for actuating the same, a movable cross-head, C, guided in the frame, and the cords or ropes secured at one end to the crosshead and passing over the pulleys of the frame and the drums of the shaft E, all conibined and arranged substantially as described. 2. In a scaffold, a frame consisting of sills nuprights ac, provided upon their inner faces with grooves b, in combination with the crosshead C, having tenons c, provided at their sides with friction-rollers 7c, cord c?, sheaves or pulleys c', drums e, mounted upon the shaft E, operated by handle y y, substantially as described. Y

3. In a scaffold, the combination of the frames A, having at their upperends the caps a", earryingthesheaves of, ashaft,E,jon1-naled in the frame and having the drums and gear- Wheels, a driving-shaft, G, also journaled in the frame and having the gear-Wheels g, meshing with thegear-wheels of the drum-shaft,

and the ratchets Z, engaged by the pawls l', the vertically-movable cross-heads C, having the tenons at its ends guided in grooves of the frame and having the eyebolts, and the cords or ropes c2, passing over the sheaves c and the drums of the shaft E, all arranged and conibined substantially as described.

In testimony that I elaini the foregoing 'as my own I have hereto affixed my signature in presence of two Witnesses.

THOMAS CHARLES GOUDIE.

Witnesses:

H. A. DOUGLAS, W. D. ALLIsoN. 

